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6.2 Stars and the Universe

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Question 4

According to Hubble's law, the recessional velocity v v\,v of a distant galaxy is proportional to its distance d d\,d from Earth, expressed as:

v=H0d v = H_0 d v=H0​d

where H0 H_0\,H0​ is the Hubble constant. Assuming the expansion rate of the Universe has been constant since the Big Bang, which of the following is an estimate for the age of the Universe?

A

H0H_0H0​

B

1H0\frac{1}{H_0}H0​1​

C

dH0\frac{d}{H_0}H0​d​

D

H02H_0^2H02​

Markscheme

6.2 Stars and the Universe Questions

  1. IGCSE
  2. /Physics
  3. /6.2 Stars and the Universe

104 exam-style questions on CIE IGCSE Physics 6.2 Stars and the Universe, covering 6.2.1 The Sun as a star, 6.2.2a Galaxies and astronomical distances, 6.2.2b The life cycle of a star, 6.2.3a Galaxies and the scale of the Universe, 6.2.3b Redshift, 6.2.3c The Big Bang Theory and cosmic microwave background radiation, and 6.2.3d The Hubble constant and the age of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.

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